大众桑塔纳2000 1.8 96-04前氧传感器 030906265BC 0258003611 精准空燃比监测

Volkswagen Santana 2000 with rough idle, obviously rising fuel consumption, acceleration weakness or check engine light on; usually front oxygen sensor aged. This sensor monitors oxygen content in exhaust in real time and feeds ECU to precisely regulate injection to achieve best stoichiometry, improving power and reducing emissions. OEM number 030906265BC, corresponding to 0258003611, fits VW Santana 2000 1.8L 96-04. Installation：do it with cold engine to avoid burns; use dedicated socket and torque to spec; check wiring plug cleanliness and firmness to prevent poor contact.